57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/* The <minix/ansi.h> header attempts to decide whether the compiler has enough
|
|
* conformance to Standard C for Minix to take advantage of. If so, the
|
|
* symbol _ANSI is defined (as 31415). Otherwise _ANSI is not defined
|
|
* here, but it may be defined by applications that want to bend the rules.
|
|
* The magic number in the definition is to inhibit unnecessary bending
|
|
* of the rules. (For consistency with the new '#ifdef _ANSI" tests in
|
|
* the headers, _ANSI should really be defined as nothing, but that would
|
|
* break many library routines that use "#if _ANSI".)
|
|
|
|
* If _ANSI ends up being defined, a macro
|
|
*
|
|
* _PROTOTYPE(function, params)
|
|
*
|
|
* is defined. This macro expands in different ways, generating either
|
|
* ANSI Standard C prototypes or old-style K&R (Kernighan & Ritchie)
|
|
* prototypes, as needed. Finally, some programs use _CONST, _VOIDSTAR etc
|
|
* in such a way that they are portable over both ANSI and K&R compilers.
|
|
* The appropriate macros are defined here.
|
|
*/
|
|
|
|
#ifndef _MINIX_ANSI_H
|
|
#define _MINIX_ANSI_H
|
|
|
|
#if __STDC__ == 1
|
|
#define _ANSI 31459 /* compiler claims full ANSI conformance */
|
|
#endif
|
|
|
|
#ifdef __GNUC__
|
|
#define _ANSI 31459 /* gcc conforms enough even in non-ANSI mode */
|
|
#endif
|
|
|
|
#ifdef _ANSI
|
|
|
|
/* Keep everything for ANSI prototypes. */
|
|
#define _PROTOTYPE(function, params) function params
|
|
|
|
#define _VOIDSTAR void *
|
|
#define _VOID void
|
|
#define _CONST const
|
|
#define _VOLATILE volatile
|
|
#define _SIZET size_t
|
|
|
|
#else
|
|
|
|
/* Throw away the parameters for K&R prototypes. */
|
|
#define _PROTOTYPE(function, params) function()
|
|
|
|
#define _VOIDSTAR void *
|
|
#define _VOID void
|
|
#define _CONST
|
|
#define _VOLATILE
|
|
#define _SIZET int
|
|
|
|
#endif /* _ANSI */
|
|
|
|
#endif /* _MINIX_ANSI_H */
|